#!/bin/python3
#-*- coding: utf-8 -*-
# exp_22.py
# @author 刘秋
# @email lq@aqiu.info
# @description
# @created 2020-04-16T10:46:08.529Z+08:00
# @last-modified 2020-04-16T10:59:01.464Z+08:00
#

#两个乒乓球队进行比赛，各出三人。甲队为a,b,c三人，乙队为x,y,z三人。已抽签决定比赛名单。有人向队员打听比赛的名单。a说他不和x比，c说他不和x,z比，请编程序找出三队赛手的名单。

# import numpy as np
# import pandas as pd

# df = pd.DataFrame(np.zeros((3,3)),index=list("xyz"),columns=list("abc"))

# df["a"]["x"]=1
# df["c"][["x","z"]]=1

# print(df)

for i in range(ord('x'), ord('z') + 1):
    for j in range(ord('x'), ord('z') + 1):
        if i != j:
            for k in range(ord('x'), ord('z') + 1):
                if (i != k) and (j != k):
                    if (i != ord('x')) and (k != ord('x')) and (k != ord('z')):
                        print('order is a -- %s\t b -- %s\tc--%s' %
                            (chr(i), chr(j), chr(k)))
